Clam-shell bucket.



I B. 0.. BROWN.

CLAM SHELL BUCKET.

APPLICATION HLED JULY 7.1916

1923mm Patented July'24, 1917.

UNITED STATES PATENT UFFTQEQ BYRON C. BROWN, OF NEW YORK, N. Y.

SLAM-SHELL BUCKET.

Application filed July 7, 1916.

To all VII/L07 it may concern Be it known that I, BYRON C. BROWN, a citizen of the UnitedStates, residing at New York, county and State of New York, have invented certain new and useful Improvements inClam-Shell Buckets, of which the following is a specification.

This invention relates to improvements in hoisting buckets of the clam shell type, and the general object thereof is to reduceto a minimum wear and tear of the cable and cooperating sheaves included in the opening and closing mechanism of the bucket; and further to prevent the bucket from tilting duringtheclosing thereof under the pull of the operating cable. And to these ends the invention resides in the provision of a cross over sheave and upper sheaves posi tioned in such relation to each other and to the lower sheaves as will permit the cable between the lower and the upper sheaves and the cross over sheave to extend in straight vertical lines and to lead vertically from one of the lower sheaves disposed at approximately the middle of the bucket.

()ther objects will appear and be better understood from that embodiment of my in .vention of which the following is a specification, reference being had to the accompanying drawings forming part hereof, and in which:

Figure 1, is a side elevation of a clam shell bucket equipped with my improved device.

Fig. 2, is an enlarged detail front elevation of the upper portion of a bucket showing the device looking at right angles to Fig. 1.

Fig. 3, 1s a diagrammatic view of the rigging.

In carrymg out the present invention I i provide a housing 5, and adapt this element to be interposed between the inner portions of the arms 6-6, which are connected to the sections 7-7, of the bucket a. The

trunnion shaft 8, passes through eyes in the lapped inner end portions of arms 6-6, and through the housing 5 and thereby operates to connect the arms 6-6, and to sup port the housing. The lower sheave shaft 9, extends through the recessed portion 10, of the housing and is disposed above trunnion shaft 8, and the lower sheaves 5, herein shown as four in number, are arranged in the recess 10, and are rotatably mounted on Specification of Letters Patent.

Patented July 24, 1917.

Serial No. 107,886.

ends of which are connected by pins 1212,

to lugs 1313, secured to the upper outer corner portions of the sections 7-7, of the bucket a. The hanger shaft 14, passes through the lapped upper end portions of the hangersl, and through the head 0 and thereby operates to support the head and to connect the hangers 11-11, therewith. A cross over sheave 15, is disposed in a recess 16, in one side of head 0 and is rotatably mounted on a shaft 17 which extends at right angles to the lower sheave shaft 9. The head 0 is also provided with depending recessed extensions 18 and 19. These extensions are disposed obliquely to each other and constitute housings. The upper sheaves d are disposed in the recesses of the housings and are arranged obliquely to each other and to the lower sheaves, and the upper sheave shafts 2020,

.upon which the upper sheaves d are ropoints on the peripheries of the lower sheaves, and opposite points on each of the upper sheaves aline with portions of the pa ripheries of the pair of lower sheaves located directly therebeneath.

The operating cable 21 is disposed with one end secured to a becket 22, arranged on one side of head c and in the present instance this becket 22 is disposed in alinement with a portion of one of the interme diate sheaves indicated by 23. From becket 22 the cable extends downwardly and under sheave 23, then upwardly and over sheave 24 of the upper sheaves 6. From sheave 24 the cable extends downwardly and under one of the end sheaves 25 of the lower Sheaves b, then upwardly and over the cross over sheave 15, then downwardly and under the other of the end sheaves 26 of the lower sheaves b, then upwardly and over the upper sheave 27. From sheave 27 the cable passes downwardly and under the other of the intermediate sheaves 28 of the lower sheaves b, then upwardly and be-- tween guide sheaves 29 and 80, which are arranged in a recessed portion of the head 0 and respectively disposed on a shaft 81 secured to the head and on the hanger shaft 14:.

With the foregoing arrangement it will be first observed that the portions of the cable between the lower and the upper sheaves and between the former and the cross over sheave extend vertically; and second, the portion of the cable which leads upwardly and outwardly from sheave 28, and passes between the guide sheaves 29 and 30, and finally leads to a drum of the hoisting mechanism (not shown), is arranged adjacent to the vertical central line of the bucket. In other words it is disposed so as to lead upwardly and outwardly from the middle portion of the bail 32 to which portion is connected one end of the hoisting cable (not shown) when the bucket is in use.

By having the parts so disposed that the cable extends as just described, the same is prevented from contacting with the relatively thin edges of the grooved peripheries of the sheaves. As a consequence of this the cable in moving will not operate to wear away one edge of the grooved periphery of any sheave in advance of the other edge thereof. Also when the cable operates to close the sections 7-7, the pull produced by the cable on the bucket will not cause the same to tilt laterally because the upward and outward lead of the cable is relatively close to the vertical central line of the bucket as before described.

The sections 77, may be built up structures of metallic plates or otherwise suitably constructed. The housing 5, and the head 0 may be castings or constructed in any other desirable manner. Cotter pins 33 or any other suitable form of fastening means may be employed for securing against displacement the various shafts previously mentioned. It will be noted that the shaft 34, upon which the bail 32 is disposed is provided with a roll 35 which cooperates with a roll 36 on a shaft 37 to guide the cable in passing from and toward the guide sheaves 30 and 31.

.VVhat is claimed as new is:

1. In a clam shell bucket the combination with the trunnion shaft and the hangers; of a housing supported by the trunnion shaft and disposed between the hangers, a head disposed above the housing and connected to the hangers, a plurality of lower sheaves arranged in a row and disposed in the housing and including intermediate and end sheaves, a plurality of upper sheaves and a cross over sheave connected to the head, an operating cable trained around all of said sheaves, and leading upwardly and outwardly from the lower intermediate sheave, the disposition and diameters of the said cross over sheaves and the said upper sheaves with respect to the row of lower sheaves being such that the runs of the cable between all of said sheaves extend parallel and verticahsaid cross over sheave being arranged in such relation to the upper sheaves carried by the head and these being arranged in such relation to the lower sheaves that the intervening portions of the cable between the upper and the lower sheaves are parallel and vertical.

2. In a clam shell bucket the combination with the trunnion shaft and the hangers; of a housing supported by the trunnion shaft and disposed between the hangers, a head disposed above the housing and conn'eeted to the hangers, a plurality of lower sheaves carried by the housing and including an intermediate and end sheaves, a cross over sheave carried by the head and dis Josed at ri ht an les to the lower sheaves a plurality of upper sheaves disposed obliquely to the cross over sheaves and to each other, and an operating cable trained around all of said sheaves and leading upwardly and outwardly from the lower intermediate sheave.

3. In a clam shell bucket the combination with the trunnion shaft and the hangers; of a housing supported by the trunnion shaft and disposed between the hangers, a head disposed above the housing and connected to the hangers, a plurality of lower sheaves carried by the housing and including an intermediate and end sheaves, across over sheave carried by the head and disposed at right angles to the lower sheaves and approximating in diameter the distance between the lower end sheaves, a pair of upper sheaves carried by the head and disposed obliquely to the cross over sheaves and to the lower sheaves and to each other, and further disposed so that portions of their peripheries aline with corresponding portions of the peripheries of the lower sheaves, and an operating cable trained around all of said sheaves and extending upwardly and outwardly from the lower intermediate sheave.

In testimony whereof, I have signed my name to this specification.

BYRON C. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

